package com.tanhua.dubbo.server.api;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.convert.Convert;
import cn.hutool.core.date.DateUtil;
import cn.hutool.core.util.ObjectUtil;
import com.alibaba.dubbo.config.annotation.Service;
import com.tanhua.dubbo.server.pojo.RecommendUser;
import com.tanhua.dubbo.server.pojo.Visitors;
import com.tanhua.dubbo.server.vo.PageInfo;
import org.bson.types.ObjectId;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.data.redis.core.RedisTemplate;

import java.util.List;
@Service(version = "1.0.0")
public class VisitorsApiImpl implements VisitorsApi {
    @Autowired
    private MongoTemplate mongoTemplate;

    private static final String VISITOR_REDIS_KEY = "VISITOR_USER";

    @Autowired
    private RedisTemplate<String, String> redisTemplate;
    //保存访客信息
    @Override
    public String saveVisitor(Long userId, Long visitorUserId, String from) {

        //校验
        if (!ObjectUtil.isAllNotEmpty(userId,visitorUserId,from)) {
            return null;
        }

        String today = DateUtil.today();
        long minTime = DateUtil.parseDateTime(today + " 00:00:00").getTime();
        long maxTime = DateUtil.parseDateTime(today + " 23:59:59").getTime();

        Query query=Query.query(Criteria.where("userId").is(userId)
        .and("visitorUserId").is(visitorUserId)
                .andOperator(Criteria.where("date").gte(minTime),
                        Criteria.where("date").lte(maxTime)));
        long count = this.mongoTemplate.count(query, Visitors.class);
        if (count>0){
            return null;
        }
        Visitors visitors=new Visitors();
        visitors.setDate(System.currentTimeMillis());
        visitors.setFrom(from);
        visitors.setId(ObjectId.get());
        visitors.setUserId(userId);
        visitors.setVisitorUserId(visitorUserId);

        this.mongoTemplate.save(visitors);

        return visitors.getId().toHexString();
    }

    @Override
    public List<Visitors> queryMyVisitor(Long userId) {
        // 查询前5个访客数据，按照访问时间倒序排序
        // 如果用户已经查询过列表，记录查询时间，后续查询需要按照这个时间往后查询

        // 上一次查询列表的时间
        Long date = Convert.toLong(this.redisTemplate.opsForHash().get(VISITOR_REDIS_KEY, String.valueOf(userId)));

        PageRequest pageRequest = PageRequest.of(0, 5, Sort.by(Sort.Order.desc("date")));
        Query query = Query.query(Criteria.where("userId").is(userId))
                .with(pageRequest);
        if (ObjectUtil.isNotEmpty(date)) {
            query.addCriteria(Criteria.where("date").gte(date));
        }

        List<Visitors> visitorsList = this.mongoTemplate.find(query, Visitors.class);

        //查询每个来访用户的得分
        for (Visitors visitors : visitorsList) {

            Query queryScore = Query.query(Criteria.where("toUserId")
                    .is(userId).and("userId").is(visitors.getVisitorUserId())
            );
            RecommendUser recommendUser = this.mongoTemplate.findOne(queryScore, RecommendUser.class);
            if(ObjectUtil.isNotEmpty(recommendUser)){
                visitors.setScore(recommendUser.getScore());
            }else {
                //默认得分
                visitors.setScore(90d);
            }
        }

        return visitorsList;
    }


    // 按照时间倒序排序，查询最近的访客信息
    @Override
    public PageInfo<Visitors> topVisitor(Long userId, Integer page, Integer pageSize) {

        //封装返回对象
        PageInfo<Visitors> pageInfo=new PageInfo<>();
        pageInfo.setPageSize(pageSize);
        pageInfo.setPageNum(page);
        //构造查询条件
        Pageable pageable=PageRequest.of(page-1,pageSize,Sort.by(Sort.Order.desc("data")));
        Query query=Query.query(Criteria.where("userId").is(userId)).with(pageable);

        List<Visitors> visitors = this.mongoTemplate.find(query, Visitors.class);

        if (CollUtil.isEmpty(visitors)){
            return pageInfo;
        }
        pageInfo.setRecords(visitors);
        //将查询的时间存入redis
        this.redisTemplate.opsForHash().put(VISITOR_REDIS_KEY,String.valueOf(userId),String.valueOf(System.currentTimeMillis()));

        return pageInfo;
    }
}
